Abstract We present UnTraceable Transactions (UTT), a system for decentralized ecash with
accountable privacy. UTT is the first ecash system that obtains three critical properties:(1) it …

Abstract The proliferation of Decentralised Finance (DeFi) and Decentralised Autonomous
Organisations (DAO), which in current form are exposed to front-running of token …

In this work we improve upon the state of the art for practical zero-knowledge for set
membership, a building block at the core of several privacy-aware applications, such as …

We advance the state-of-the art for zero-knowledge commit-and-prove SNARKs (CP-
SNARKs). CP-SNARKs are an important class of SNARKs which, using commitments as …

In cryptocurrencies, all transactions are public. For their adoption, it is important that these
transactions, while publicly verifiable, do not leak information about the identity and the …

Commitments to key-value maps (or, authenticated dictionaries) are an important building
block in cryptographic applications, including cryptocurrencies and distributed file systems …

Abstract Zero Knowledge Set Membership Proofs (zkSMPs) allow efficiently, ie sublinearly in
the size of the set, proving membership of a value in a set in zero knowledge with respect to …

Lookup arguments allow an untrusted prover to commit to a vector $\vec f\in\mathbb {F}^ n $
and show that its entries reside in a predetermined table $\vec t\in\mathbb {F}^ N $. One of …

We study blockchain-based provably anonymous payment systems between light clients.
Such clients interact with the blockchain through full nodes, who can see what the light …

Mixing services provide unlinkability for blockchains by breaking the link between
sender/receiver identities and are highly appreciated for their compatibility with the …